Nokia NHL-2NA Series Troubleshooting Instructions Download Page 37

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CCS Technical Documentation

NHL-2NA

Issue 1 07/02

Nokia Corporation

Page 31

GAIN MIN LIMIT FAIL (0x0C)

There is a detection at each gain. IRED, RSENSE and photodiode are OK. Possible reasons
are shortcut in RSENSE, missing optical insulator or wrong start values in calibration.

Figure 8:

GAIN MIN LIMIT FAIL troubleshooting

GAIN MIN

LIMIT FAIL

YES

Is the

calibration

done

correctly?

Check correct start
values from Sensor
Calibration Instructions
and repeat calibration.

YES

Is RSENSE

4R3 and

soldering

OK?

Proximity

rubber OK?

Screws

were tight?

Replace
RSENSE

Replace AEM

YES

Follow respective

error message

calibration

OK?

YES

Save calibrated values

to the phone

Disasseble the phone
to MJS-9Q

YES

calibration

OK?

Follow respective

error message

YES

Save calibrated values

to the phone

Try calibration in MJS-
9Q

GAIN MIN

LIMIT FAIL?

If you have checked
mechanics, RSENSE
and AEM the phone
is beond economical
repair

Reassemble the phone,
replace proximity rubber
and optcs if needed

Summary of Contents for NHL-2NA Series

Page 3: ...al power checking 10 SMPS of AEM troubleshooting 12 Power key troubleshooting 13 Clocks troubleshooting 14 Charging checking 17 Energy management calibration 20 ADC reading 21 Backup battery 21 IR interface 23 Sensors troubleshooting 25 Proximity Detector 26 General notes 26 Proximity Detector components 26 Handsfree shuts down automaticallly in sunshine 27 PD calibration 27 Troubleshooting with P...

Page 4: ...onnectors 59 RF Troubleshooting 1 Introduction 1 RF Key component placement 2 Fault finding test point locations 3 Receiver 4 General description 4 E GSM900 5 GSM1800 8 Picture of RX signal 10 Transmitter 11 General description 11 E GSM900 12 GSM1800 13 Fault finding tree 14 Example of TX signals 15 Common 17 Antenna switch control logic reference Z672 17 VCTCXO reference G591 17 Frequency synthes...

Page 5: ...leshooting 1 Introduction 1 Backlight 2 Current Gauge 3 Vibra 4 Keyboard 5 Hall Sensor 6 Camera Troubleshooting Instructions 1 Background tools and terminology 1 Terms 1 Image taking conditions effect to image quality 2 Camera construction 8 Image quality analysis 9 Possible faults in image quality 9 Testing for dust 9 Testing for sharpness 10 Bit errors 14 Fault finding trees 15 Hardware failure ...

Page 6: ...NHL 2NA CCS Technical Documentation Page 4 Nokia Corporation Issue 1 07 02 ...

Page 7: ...cation key under display side keys power key and IHF enabling key Flex cable carries signals between LG4 and LS4 boards Battery and charger plug is in grip part so if the flex is damaged phone cannot be powered on UI module display backlights etc is also connected to LG4 module with flex cable If the component reference is under 100 component is located at the LS4 board And if the component refere...

Page 8: ...roubleshooting procedure for the module If there is an obvious fault repair it before reflashing the device Flash first if a fault is not obvious If flashing is not working go to flashing troubleshooting Due to CSP packages short circuits or broken solder joints are not easily seen If the examined signal seems to be continuously in low or high level then measure for possible short circuit to groun...

Page 9: ...measured from a complete NHL 2NA Vbatt 3 8 4 2V Measured nominal currents are drawn from the main battery Measurements have been made with a current probe connected to an oscilloscope Operating mode Current consumption Idle BT off 4 8 mA 2w audio call backlights off channel37 300 340mA Viewfinder nominal backlights 232mA ...

Page 10: ...NHL 2NA CCS Technical Documentation Page 4 Nokia Corporation Issue 1 07 02 Troubleshooting paths Dead or jammed device ...

Page 11: ... recognized Microphone is not working Volume cannot be adjusted Ringing tones do not work Audio volume too low If symptom is something like above see audio troubleshooting Most common symptoms for Irda and bluetooth problems can be Irda does not work or it does not make a connection Bluetooth does not work or connection cannot be established If symptoms are something like those start to follow Ird...

Page 12: ...g Most common RF related symptoms Call cannot be made Phone does not find signal Call is often dropped See RF troubleshooting Problems with camera can cause symptoms as Bad image quality Picture cannot be taken See camera module troubleshooting Problems in LS4 can cause symptoms below Backlight of grip is dim Baclight of grip not even Backlight of grip is blinking Grip keypad is not working Vibra ...

Page 13: ...is powered on and if one or more selft est functions fail the message Contact the retailer is shown on the display MCU selftest cases can be split into two categories The ones that are executed during power up and the ones that are executed only with a PC connected These tests and the items included are as follows Figure 1 BB selftest tool If a selftest fails see relevant chapter in this troublesh...

Page 14: ...ssages during flashing greatly help on defining what is wrong To be able to flash the device most device BB area components must function properly Flashing faults Measure I_FBUS_TX J121 line during flash programming is it 1 8V Change UEM No Yes Check BSI line Battery connector flex C239 Z383 R384 Yes Yes The phone does not set Flashbus TXD line high after startup The phone does not set the flashbu...

Page 15: ...test Flash informs about a failure during flashing No Check flash0 bypass caps check Vpp connection to flasher Check Vpp resistor 4 7k Ok Change flash0 Yes Yes Activity in sdram clk J108 pad No Change UPP_WD2 Yes Voltages VmemA and VioA ok No EM troubles No Yes and sdram allready changed No Data block handling timeout message Bluetooth module is unable to start flashing Check V590 R591 R593 596 C5...

Page 16: ...is something wrong in BSI line the device seems to be dead after the power key is pressed However the regulators of the device are on a few seconds before the power down This mode can easily be detected from the current consumption of the device After a few seconds the current consumption drops almost to 0 mA In this case check components listed below or soldering Battery connector X002 Grip conne...

Page 17: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 11 ...

Page 18: ...NHL 2NA CCS Technical Documentation Page 12 Nokia Corporation Issue 1 07 02 SMPS of AEM troubleshooting ...

Page 19: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 13 Power key troubleshooting ...

Page 20: ...M generates low frequency clock signal 32 768 kHz that is fed to UPP_WD2 Bluetooth and AEM When the flashing of the device does not succeed but powering is OK follow these instructions Note The absence of clocks may indicate that the device put phone to LOCAL mode when the sleep is not allowed or press buttons so that phone is not in sleep mode is in sleep mode Make sure that the device is not in ...

Page 21: ...not exist check voltage from C662 it should be 2 78V UEM regula tor VR3 If voltage is OK check G591 and other componets around it Figure 2 26 Mhz clock 2 Check 13Mhz Rfclk from testpoint J100 See figure below Offset should be about 900mV If the offset does not exist something is broken inside UPP_WD2 or DC filtering capacitor in series on trace Figure 3 13 MHz clock ...

Page 22: ...6 Nokia Corporation Issue 1 07 02 3 Check is the crystal oscillator B190 oscillating at 32 768kHz frequency If not change B190 If OK measure sleepclk from testpoint J101 Frequency should be the same 32 678kHz see figure below If not change UEM ...

Page 23: ...mber that start up charging might take a little bit longer time than normal During this time display is blank If charger is not NMP approved type and its current and voltage is not within NMP charger window then software does not start charging and there is NOT CHARGING on the display Voltage should be between 5 5V 9 3V and current between 200mA 850mA Remove and reconnect battery and charger few t...

Page 24: ...NHL 2NA CCS Technical Documentation Page 18 Nokia Corporation Issue 1 07 02 ...

Page 25: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 19 ...

Page 26: ...383 Pull up resistor R384 If these are OK change UEM Btemp Gain over limits Inspect Btemp line connectors hotbar and board to board connector and components in it Varistor R006 Capacitor C010 EMI filter Z383 Pull up resistor R383 If these are OK change UEM Vbatt offset and Gain Inspect Vbatt lines and component in it Vchar over limits Inspect components which are connected Vchar line Filtering cap...

Page 27: ... In this case perform EM calibration to get full performance of phone Maximum tolerances are Reading Check point Tolerance Vbatt SCAL 4 2V 25mV Vchar 8 4V 40mV Ichar 500mA 20mA BSI 68k BLB 2 1 3kohm Btemp 273K 47k 5K Backup battery Symptom of backup battery fault is Real Time Clock loses the correct time during short main battery removal The same syptom can also be seen when the backup battery is ...

Page 28: ...p battery Normal operation when the voltage is 2 0V Fully charged when the voltage is about 3 2V because of large internal imped ance voltage won t stay above 3 0V a long time after charging is disabled 3 Enable backup battery charging start to charge main battery or boot device to LOCAL or TEST mode 4 Measure voltage of backup battery during charging It should arise if it is not 3 2V yet 5 When t...

Page 29: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 23 IR interface ...

Page 30: ... 1 with voltage meter first the pad and then the pin there is sup posed to be battery voltage 7 Make sure resistors R360 R363 are connected and 10ohm 8 Propably the fault is in PWB 9 Replace the IR module 10 Check Vcc pins 6 and 7 in IR module supposed to be connected to VMEMA again first the pads and then the pins 11 Looking for shortcircuits in capacitors C360 C363 12 Check lines 3 4 and 5 in IR...

Page 31: ...ted in production in FINUI tester AMS has possibility to calibrate proximity sensor at service points ambient light sensor is repaired in Bochum This document is ment to be used only in troubleshooting and does not provide informa tion on basic functionality of the systems Basic operating principle can be found in chapter System Module LG4 and Grip Module LS4 calibration instructions can be found ...

Page 32: ...but also loudspeaker is not on the problem is most likely in the handsfree circuitry When the problem is located on the proximity detector the first thing to do is to check that proximity detector lenses are roughly OK If any physical damage is found replace lens module before proceeding to detailed troubleshooting If the problem is not this simple the best way to look for the problem is to use PD...

Page 33: ...M are gain detection threshold and fault detection threshold When you start the calibration tool the values in the PMM are shown in the left column Second column shows start values used in calibration they are defined by R D Calibration consists of two phases First gain and detection thresh old are calibrated If this calibration is finished successfully software starts fault thresh old calibration...

Page 34: ...s replace proximity optics Another option is that detection offset is too big for calibrated detection threshold This isn t possible if start values are correct Use default start values OFFSET FAIL 0x05 Selected offset could not be used with this calibration result Check that you have used correct default offset Then replace the optics DET NOT DONE 0x06 Fault calibration can be done only directly ...

Page 35: ...n threshold There are two reasons that could cause this failure Detection calibration is done without the calibration target or the target was too far from the phone Fault calibration was done with the calibration target Check calibration conditions and repeat calibration GAIN MAX LIMIT FAIL 0x0B Gain value has reached its maximum limit and there are no detections This means that path from tx to r...

Page 36: ...T FAIL Fix the target and repeat calibration Was reflectance target properly placed NO YES Is calibration OK Follow respective error message NO YES Save calibrated values to the phone YES Check TX and RX path replace needed components fix solder problems 1 NO Save calibrated values to the phone Is calibration OK NO Follow respective error message Replace AEM Disassemble the phone to MJS 9Q GAIN MA...

Page 37: ...rt values from Sensor Calibration Instructions and repeat calibration NO YES Is RSENSE 4R3 and soldering OK Proximity rubber OK Screws were tight Replace RSENSE Replace AEM NO NO YES Follow respective error message Is calibration OK NO YES Save calibrated values to the phone Disasseble the phone to MJS 9Q YES Is calibration OK Follow respective error message NO YES Save calibrated values to the ph...

Page 38: ...nsation of the ambient light detector Before starting troubleshooting according to these instructions it must be ensured that the problem really is in the ambient light detector Other possibility is e g UI module or backlight powering itself This can be checked easily because light sensor can be turned off Calibration of the Ambient Light Detector is needed always when the phototransistor is repla...

Page 39: ... be referred to as ALD Main components of the ALD are phototransistor SFH3410 V130 4864901 pull up resistor 22kΩ R131 and UEM D190 ADC There is also an NTC resistor 47kΩ R132 1820037 which is used for temperature compensation Temperature compensation is done by SW Figure 10 Ambient Light Sensor components V130 collector V130 emitter R131 R132 ...

Page 40: ...1 ALD circuitry is working Use Phoenix to see ADC readings and VCXOTEMP Read the sensor in bright light Does sensor reading change with illumination 2 Is VCXOtemp readind around the right value Check pull up resistor and phototransistor 3 No Yes No No Yes No Yes Disassemble the phone to MJS 9Q Disassemble the phone to MJS 9Q Check pull up resistor and NTC resistor 4 Is ALD mechanics OK 5 Replace A...

Page 41: ...d VFLASH1 is 22kΩ R131 Check that resistance between collector and emitter of the ambient light sensor changes when illumination on the sensor from 5kΩ in high illuminance to 500kΩ in total darkness V130 If phototransistor has to be replaced the detector has to be calibrated Calibration can be done only with TDS 11 light source 4 NTC R132 resistance at room temperature is 47kΩ 5 Check following po...

Page 42: ...itryisworking UsePhoenixtosee ADC readingsand VCXOTEMP Doessensor reading changewith illumination 2 CheckVFLASH1 pull up resistor andambient light sensor 3 No Yes No No Yes Calibratethelight sensor Disasseblethe phonetoMJS 9Q Calibratethelight sensor Is VCXOtemp readind aroundthe right value No Yes Disassemblethe phonetoMJS 9Q Checkpull upresistor andNTCresistor 4 Isthe functionality OK No Yes Pro...

Page 43: ...at pull up resistor pin should be 2 78V Check that resistor R131 is placed and it s resistance is 22kΩ Check that resistance between col lector and emitter of the ambient light sensor changes when illumination on the sensor from 5kΩ in high illuminance to 500kΩ in total darkness If pho totransistor has to be replaced the detector has to be calibrated Calibration can be done only with TDS 11 light ...

Page 44: ... SIM power up down sequence is generated in the UEM This means that the UEM generates the RST signal to the SIM Also the SIMCardDet signal is connected to UEM First the SW attempts to power up the SIM with 1 8 V If this does not succeed power up is repeated with VSIM switched to 3 V The data communication between the card and the phone is asynchronous half duplex The clock supplied to the card is ...

Page 45: ...cumentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 39 Figure 14 SIM Power Up Figure 15 SIM answer to reset Ch1 Vsim Ch2 sim_data Ch3 sim_clk Ch4 sim_reset Ch1 Vsim Ch2 Reset Ch3 Clock Ch4 I O Measured with 3Vsim ...

Page 46: ...NHL 2NA CCS Technical Documentation Page 40 Nokia Corporation Issue 1 07 02 Figure 16 SIM Clk 3 25MHz ...

Page 47: ...d no power if low measure C470 if ok change R470 still not ok change UEM No Check Vsim resistance to gnd no power if low measure C470 if ok change R470 still not ok change UEM No Yes Clean pwb pads and connector change connector No Yes Check SIM connector Is it ok Check SIM power up sequence Is it ok Either UPP_WD2 or UEM is faulty Change UEM first and if still fails the tests change UPP_WD2 No Ch...

Page 48: ...NHL 2NA CCS Technical Documentation Page 42 Nokia Corporation Issue 1 07 02 Audio Microphone ...

Page 49: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 43 Earpiece Check that holes are not covered ...

Page 50: ... 02 IHF In the case of IHF fault the reason can be found from integrated hands free itself or proximity sensor Proximity sensor disables IHF if phone is too near some object It is pos sible if the proximity sensor is faulty IHF can not be enabled even if it is working fine ...

Page 51: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 45 Accessory detection troubleshooting ...

Page 52: ...nnot be successfully accessed or there is a soldering problem somewhere either under UPP or sdram flash1 D310 is partially totally damaged During flashing the manufacturer device and revision id s are read but flashing is done based on id s of the flash0 D311 This means that one cannot see any error messages displayed on Phoenix window during flashing if flash1 is failing Id s are however displaye...

Page 53: ...ock and bus_enable signals In NHL 2NA the bus is connected from UPP WD2 to AEM UEM and the BT module UPP_WD2 takes care of controlling the traffic on the bus If the interface is faulty from the UPP WD2 s end the phone will not boot properly as powering configurations do not work Traffic on the bus can be monitored from three pins on the BT module Pins are shown below Figure 17 CBUS measuring point...

Page 54: ...rite command to AEM However if you are able to get the phone to boot up and can reach Phoenix BB self tests it is possible to test the functionality of each component attached to Cbus Use ST_AEM_CBUS_IF_TEST to test AEM Cbus interface ST_UEM_CBUS_IF_TEST to test UEM Cbus interface ST_LPRF_IF_TEST to test Bluetooth Cbus interface If an error is found testing any of the abowe components you should r...

Page 55: ...NORMAL LOCAL nor TEST modes Phoenix tests can be performed through MBUS interface in the case of a failure in FBUS interface Flashing is not possible if there is a problem in FBUS interface MBUS MBUS is a two wire RX and TX interface between UPP and UEM From UEM the interface continues to flash test interface as a one wire interface UEM adjusts the voltage levels The interface voltage level on the...

Page 56: ...dless the position of the magnet Measure that N380 is properly soldered and it has 2 78V in pin 1 Pin 3 should be down when magnet is not above the component 1 8V when magnet is above it no Hall sensor malfunction Phone thinks grip is open all the time Check that magnet is in its place and it s as effective as specified Change the N380 to a new one and retest Hall sensor works yes Phone thinks gri...

Page 57: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 51 Display backlights troubleshooting ...

Page 58: ...ting Do you have any FPS 8 errors Does the phone s main SW flash correctly Attempt to re flash the phone Go to Calypso s Flashing Troubleshooting Section BT Failure Part I Flashing problems No Yes Yes No Does the BT SW flash correctly BT Flashing OK 1 Replace BT MCM 2 Attempt to Flash Phone Yes No ...

Page 59: ... electrically connected to BT antenna i e short circuit Replace BT antenna i e new chassis Can you make a connection to BT Box Go to BT Failure Part III Go to BT Failure Part III Is BER 0 1 BT OK No Yes Yes No Yes Yes No No Check soldering of BT MCM with microscope No Yes Re Flash phone using option BT ONLY Is BT MCM propely soldered to the PWB Replace BT MCM Is soldering so bad that you must remo...

Page 60: ...30mVpp Check VREG Pin 6 with O scope Does Vin 300 900mVpp Does Freq 26MHz Check SYSCLCK Pin 50 with O scope Can you make a connection to BT Box Check VFLASH1 L431 Check VCTCXO Buffer Section Check VBAT L430 C431 BT Failure Part III BER Failure BT OK 1 Replace BT MCM 2 Flash Phone using BT ONLY Is BER 0 1 1 Replace BT MCM 2 Flash Phone using BT ONLY Yes Yes Yes No No Yes No No Yes Yes No Yes No Yes...

Page 61: ...made IMEI has to be rebuilt to the phone AEM changed If AEM is changed proximity and ambient light sensor calibrations should be achieved UPP_WD2 changed Device has to be reflashed Flash0 changed IMEI has to be reprogrammed Has to be flashed naturally IMEI has to be rebuilt to the phone RF component changed If any RF component changed RF calibration tuning has to be done ...

Page 62: ...nts in BaseBand area LG4_06_02 J100 RFclk J101 Sleepclk J102 SleepX J103 PURX J116 Txid J117 Txqd J118 Auxda J119 Rxid J120 Rxqd J104 UEMint J105 AEMSleep J110 DSPVcc J106 SDRda0 J107 SDRad0 J108 SDRclk J109 FLDa0 J111 FLXS1x J113 FLCS0x J114 FLOEX J115 FLClk J121 I_FBUS_TX J381 Vbatt J270 GenVbattIO J262 Refen ...

Page 63: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 57 ...

Page 64: ...6 GND 0 V System ground 7 VDDI IN 1 8 V Logic voltage supply 8 D1 IN OUT V Data to write V Data to read 9 D2 IN OUT V Data to write V Data to read 10 D3 IN OUT V Data to write V Data to read 11 Rocker3 200 mOhm 12 Rocker2 200 mOhm 13 GND 0 V System ground 14 Rocker5 200 mOhm 15 Rocker4 200 mOhm 16 Rocker1 200 mOhm 17 VLED IN OUT 4 5 V LED positive terminal 18 VLED IN OUT 0 V LED negative terminal ...

Page 65: ...rrent 22 Col0 IN OUT Ohm Tracking resistance mA Drive current 23 GND 0 V System ground 24 RESX IN V Reset active low 25 D5 IN OUT V Data to write V Data to read 26 D6 IN OUT V Data to write V Data to read 27 D7 IN OUT V Data to write V Data to read 28 GND 0 System ground 29 RDX IN L read active low 30 WRX IN L Write active low ...

Page 66: ...NHL 2NA CCS Technical Documentation Page 60 Nokia Corporation Issue 1 07 02 Board to board connector See System Module LG4 and Grip Module LS4 Pin order of spring connectors ...

Page 67: ...agar IC is moisture sensitive so parts must be pre baked prior to soldering Apart from key components described in this document here are a lot of discrete compo nents resistors inductors and capacitors which troubleshooting is done by checking if soldering of the component is done properly for factory repairs checking if it is missing from PCB Capacitors can be checked for shortening and resistor...

Page 68: ...NHL 2NA CCS Technical Documentation Page 2 Nokia Corporation Issue 1 07 02 RF Key component placement ...

Page 69: ...AWo p 900 S AWi p 1800 SAWi p 1800 S AWo p VCO VCC 1800 LNA_P 900 P A i p RX_I VCO BALUN o p 1800 P A i p 4G VCO o p 900 P A CONT ROL 900 P A o p 1800 LNAB_P 900 LNA i p 900 P A BIAS 1800 T X FILTi p 1800 P A o p 1800 LNA i p 900 T X BALUN i p VrefRF02 VrefRF01 VR2 VR6 T XC T XQ T XI RFBusClk Reset RFBusEna1 RFBusData 1800 P A CONT ROL 1800 P A BIAS VCO CONT ROL VCT CXO o p ...

Page 70: ...he performance of the RX bandpass SAW filters are mainly responsible for defining the receiver s blocking characteristics against spurious signals outside passband and the pro tection against spurious responses The differential RX signal is amplified and mixed directly down to BB frequency in HAGAR The LO signal is generated with external VCO This VCO signal is divided by 2 GSM1800 or by 4 E GSM90...

Page 71: ...rol range 40 dB 10 dB steps for the receiver and also the necessary DC compensation Additional 10 dB AGC step is implemented in DTOS stages DC compensation is made during DCN1 and DCN2 operations controlled via serial bus DCN1 is carried out by charging the large external capacitors in AGC stages to a voltage which effect a zero dc offset DCN2 set the signal offset to constant value VrefRF_02 1 35...

Page 72: ...NHL 2NA CCS Technical Documentation Page 6 Nokia Corporation Issue 1 07 02 ...

Page 73: ... L600 Check Baseband No Yes Spectrumanalyzer VCO o p 3769 6MHz 37 dBm Synthesizer troubleshooting No Check Hagar N505 Yes Yes Oscilloscope LNA_G 2 6V LNAB_G 2 7V Yes Yes Spectrumanalyzer 900 LNA o p 57 dBm Yes Check C610 No Oscilloscope 900 LNA o p 2 6V 900 LNA i p 0 8 V Check V610 C597 L566 L567 Yes No Check V610 L610 R616 Oscilloscope VR4 2 7V Check Hagar serial interface Check R612 No Check Hag...

Page 74: ...oubleshooting Setup steps 1 Place the phone in the test jig 2 7 6 5 4 3 Maintenance Testing RF Controls Set Active unit to Rx Set Operation mode to Continuous From Toolbar set operating mode to Local File Choose Product Calypso Select band PCN Set Rx Tx channel to 700 Set AGC to 8 FEG ON 46 dB 9 8 ...

Page 75: ...0 C631 L630 Check Baseband No Yes Spectrumanalyzer VCO o p 3685 6MHz 33 dBm Synthesizer troubleshooting No Check Hagar N505 Yes Yes Oscilloscope LNA_P 0V LNAB_P 2 6V Yes Yes Spectrumanalyzer 1800 LNA o p 58 dBm Yes Check C640 No Oscilloscope 1800 LNA o p 2 6V 1800 LNA i p 0 8 V Check V640 C632 Yes No Check V640 R642 L640 R646 Oscilloscope VR4 2 7V Check Hagar serial interface burst mode No Check H...

Page 76: ...NHL 2NA CCS Technical Documentation Page 10 Nokia Corporation Issue 1 07 02 Picture of RX signal Figure 1 Example of RX_I or RX_Q signal at 90dBm signal level ...

Page 77: ...em mode There are sepa rate outputs one for E GSM900 and one for GSM1800 In the E GSM900 branch a SAW filter is placed before PA to attenuate unwanted signals and wide band noise from the HAGAR IC The final amplification is realized with dual band power amplifier It has two separate power chains one for E GSM900 and one for GSM1800 The PA is capable of producing in excess of 2 W 0 dBm input level ...

Page 78: ...ystems Dir coupler takes a sample from the forward going power with certain ratio This signal is rectified using a Schottky diode and produces a DC sig nal after filtering E GSM900 Figure 2 E GSM900 TX Troubleshooting Setup steps 1 Place the phone in the test jig 2 7 6 5 4 3 Maintenance Testing RF Controls Set Active unit to Tx Set Operation mode to Burst From Toolbar set operating mode to Local F...

Page 79: ...p steps 1 Place the phone in the test jig 2 7 6 5 4 3 Maintenance Testing RF Controls Set Active unit to Tx Set Operation mode to Burst From Toolbar set operating mode to Local File Choose Product Calypso Select band PCN Set power level to 0 Set Tx PA mode to Free Set Rx Tx channel to 700 Set TX data type to Random 11 10 9 8 ...

Page 80: ... level 700 GSM900 Highest level 600 PCN 1800 Lowest level 170 Base level 150 Major differences Check with oscilloscope 900 1800 PA CONTROL 2 4V peak OK Replace faulty components PA ant switch troubleshooting Check output signal on 500MHz span Signal found on incorrect frequency Check GSM tx filter PCN tx balun input level 9 dBm on 900 FILT i p 24 dBm on 1800 BALUN i p OK Tune TX DAC values Check p...

Page 81: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 15 Example of TX signals Figure 4 Example of TXI signal Figure 5 Example of TXQ signal Figure 6 Example of VC2 signal ...

Page 82: ...800 PA BIAS signal Figure 8 Example of 900 1800 PA CONTROL signal Figure 9 Example of 900 TX burst from antenna connector 1 AP CLRWR A Att 35 dB RBW 100 kHz SWT 2 s VBW 100 kHz Offset 13 dB LVL Ref 40 dBm Center 897 4 MHz Span 2 MHz 200 kHz PRN 60 50 40 30 20 10 0 10 20 30 40 Date 17 JUN 2002 09 58 28 ...

Page 83: ...entation NHL 2NA Issue 1 07 02 Nokia Corporation Page 17 Common Antenna switch control logic reference Z672 VCTCXO reference G591 Figure 10 Example of VCTCXO o p signal VC1 VC2 900 TX LOW HIGH 1800 TX HIGH LOW RX LOW LOW ...

Page 84: ...PCN1800 Level 37dBm OK 4G VCO o p signal level 37dBm Check balun T580 output levels and solder joints OK Check output signal on 1GHz span Signal found on incorrect frequency Check with oscilloscope VCO CONTROL OV Check with oscilloscope VCO Vcc 2 7V OK Check VCO control loop components C581 C582 C583 R580 and R581 OK Check with oscilloscope VCO CONTROL 4V Check balun T580 output levels and solder ...

Page 85: ... Example of 4G VCO o p signal Figure 12 Example of 4G VCO CONTROL signal 900 RX channel 124 continuous mode 1 AP CLRWR A Ref 10 dBm Center 3 6856 GHz Span 2 MHz 200 kHz RBW 10 kHz VBW 100 kHz SWT 50 ms Att 10 dB PRN 110 100 90 80 70 60 50 40 30 20 10 Marker 1 T1 37 22 dBm 3 685600000 GHz 1 Date 17 JUN 2002 13 44 41 ...

Page 86: ...NHL 2NA CCS Technical Documentation Page 20 Nokia Corporation Issue 1 07 02 Figure 13 Example of 4G VCO CONTROL signal 1800 TX channel 512 continuous mode ...

Page 87: ...ting Replace faulty components Check with oscilloscope TXi TXq signals VR2 VR4 VR6 2 7V Vref01 Vref02 1 35V Hagar serial interface TXP TXC signals OK Check with RF probe 4G VCO o p signal 3589 6MHz GSM900 3495 6MHZ GSM1800 Level 37dBm OK Check modulator output components OK Replace HAGAR NO NO YES YES YES NO HAGAR troubleshooting ...

Page 88: ... 1800 PA o p OK Check with oscilloscope Ant switch Z672 Tx controls OK Check with oscilloscope PA Vcc Vcc1 Vcc2 Vcc3 2 7V 900 1800 PA bias 2 7V pulsed VTxLo_GSM 0 V GSM900 OK Check ant switch Z672 Tx control line components OK Check components surrouding PA OK Replace ant switch Replace PA Replace HAGAR Replace faulty components NO NO NO NO YES YES YES YES NO YES PA ant switch troubleshooting ...

Page 89: ...needed Must be done before other RX calibrations This function is used to calibrate RX channel select filter in GSM Phones Rx Channel select filter is tuned only in one band Single calibration for both bands Select Maintenance Tuning Rx Channel select filter calibration Select Yes to start tuning with values already saved to the phone Press AutoTune to start the tuning ...

Page 90: ...age 24 Nokia Corporation Issue 1 07 02 Tuning values should be 0 31 Select Stop If values shown are within limits choose Yes to save values to the phone save them to phone Close the RX Channel Select Filter Calibration dialog to end tuning ...

Page 91: ...nds Start RX Calibration at EGSM GSM900 then do RX Calibration at GSM1800 band AFC tuning is done while EGSM GSM900 band RX Calibration is performed Remember to take jig and cable attenuations into account Select Maintenance Tuning Rx calibration When RX Calibration has been started you can choose the correct band from the dropdown menu Begin tuning from EGSM 900 band Press Start ...

Page 92: ...nical Documentation Page 26 Nokia Corporation Issue 1 07 02 Select Default to start tuning from factory default values OK Set the Calibration mode to Automatic Press Calibrate Set RF generator to required frequency OK ...

Page 93: ... 350 AFC slope 269 150 350 RSSI0 74 67 77 RSSI1 84 77 87 RSSI2 94 87 97 RSSI3 99 5 94 104 RSSI4 109 5 104 114 RSSI5 119 5 114 124 RSSI6 129 5 124 134 RSSI7 139 5 134 144 RSSI8 149 5 144 152 Choose Stop to end tuning If values shown are within limits choose Yes to save values to the phone Continue tuning from GSM1800 Choose the correct band from the dropdown menu Press Start to continue just like i...

Page 94: ...lues and limits in GSM1800 RX Calibration GSM1800 Typical value Limits RSSI0 66 5 63 73 RSSI1 76 5 73 83 RSSI2 86 5 83 93 RSSI3 99 5 94 104 RSSI4 109 5 104 114 RSSI5 119 5 114 124 RSSI6 129 5 124 134 RSSI7 139 5 134 144 RSSI8 149 5 144 152 5 Choose Stop to end tuning If values shown are within limits choose Yes to save values to the phone ...

Page 95: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 29 Close the RX Calibration dialog to end tuning ...

Page 96: ...r Response Compensation at EGSM GSM900 then do RX Band Filter Response Compensation at GSM1800 band Note Remember to do RX calibration before doing Rx Band Filter Response Com pensation Remember to take jig and cable attenuations into account Select Maintenance Tuning Rx band filter response compensation Select Yes to start tuning with values already saved to the phone Select Manual tuning ...

Page 97: ...2NA Issue 1 07 02 Nokia Corporation Page 31 You will be asked to supply 9 different RF frequencies to the phone Set first required frequency and level OK Set 2nd required frequency and level OK Set 3rd required frequency and level OK ...

Page 98: ...ical Documentation Page 32 Nokia Corporation Issue 1 07 02 Set 4th required frequency and level OK Set 5th required frequency and level OK Set 6th required frequency and level OK Set 7th required frequency and level OK ...

Page 99: ... and limits in Rx Band Filter Response Compensation EGSM900 Channel Input frequency MHz Measured level difference dB Limits dB 965 923 26771 0 118 10 5 975 925 26771 0 511 5 5 987 927 66771 0 857 5 5 1009 932 06771 1 174 5 5 37 942 46771 0 569 5 5 90 953 06771 1 928 5 5 114 957 86771 0 964 5 5 124 959 86771 0 545 5 5 136 962 26771 0 040 10 5 Choose Stop write to PM area ...

Page 100: ...values and limits in Rx Band Filter Response Compensation GSM1800 Channel Input frequency MHz Measured level difference dB Limits dB 497 1802 26771 0 214 10 5 512 1805 26771 1 739 5 5 535 1809 86771 2 056 5 5 606 1824 06771 1 632 5 5 700 1842 86771 0 583 5 5 791 1861 06771 0 734 5 5 870 1876 86771 0 616 5 5 885 1879 86771 0 185 5 5 908 1884 46771 1 132 10 5 If values shown are within limits save v...

Page 101: ...r needed AM modulation Must be done separately on both bands Start RX AM Suppression at EGSM GSM900 then do RX AM Suppression at GSM1800 band This dialog performs RX AM Suppression Remember to take jig and cable attenuations into account Select Maintenance Tuning Rx Am suppression Start Default settings OK ...

Page 102: ... Set RF generator to state described in left side window Set the Tuning mode to Automatic Press the Tune button to perform actual tuning The new tuning values and Rssi dBm value are updated One I and Q line values sold be 0 other values 0 31 RSSI level should be around 107 dBm ...

Page 103: ...n limits Select Stop Choose Yes to save values to the phone Continue tuning from GSM1800 Choose the correct band from the dropdown menu Repeat the same steps as for the EGSM900 band If values shown are within limits choose Yes to save values to the phone Close the RX AM Suppression dialog to end tuning ...

Page 104: ...ds Start TX I Q Tuning at EGSM GSM900 then continue at GSM1800 band Remember to take jig and cable attenuations into account Select Maintenance Tuning Tx_IQTuning Select Load from product Start The tuning is done by setting each of the sliders to desired value The sliders can be changed only when the tuning is ongoing The order of tuning should be same as the order of the sliders e g the Tx I DC O...

Page 105: ...eak to minimum with TXI TXQ DC offset control f0 on spectrum ana lyzer screen Tune wrong sideband to minimum using Amplitude Phase difference controls f0 68kHz on spectrum analyzer screen A_wr i t e B_bl a nk C E N T E R 8 9 7 4 0 0 0 MH z S P A N 2 0 0 0 k H z 2 0 s S WP 3 k H z V B W 3 k H z R B W 1 0 d B R E F 3 2 0 d B m A T T 4 0 d B GS MP OW Thu Au g 30 1 1 43 4 5 2 001 REF OFS 1 1 5 dB ...

Page 106: ...e 0 2 0 2 1 1 Phase difference 88 0 92 0 80 100 If values shown are within limits check the Save to product tick box and choose Stop save the new values to the product Continue tuning from GSM1800 Choose the correct band from the dropdown menu Repeat the same steps as for the EGSM900 band Set spectrum analyzer center frequency to 1747 8 MHz span 200kHZ RBW and VWB 3kHz and sweeptime to 2 seconds ...

Page 107: ...and tuning limits GSM1800 I DC Offset 3 0 0 0 6 6 Q DC Offset 1 5 1 0 6 6 Amplitude difference 0 5 0 0 1 1 Phase difference 90 0 97 0 80 100 If values shown are within limits check the Save to product tick box and choose Stop save the new values to the product Close the TX I Q Tuning dialog to end tuning ...

Page 108: ...each power level Must be done separately on both bands Start Power Level tuning at EGSM GSM900 then continue at GSM1800 band In EGSM900 band The power level tuning is made for both high and low PA Modes In GSM1800 band only for high PA mode Maintenance Tuning Tx power level tuning Remember to take jig and cable attenuations into account Select Start Load from Permanent memory OK Note that TX PA mo...

Page 109: ...evel can be chosen by using up and down arrows or mouse The current power level is shown with inverse colors The tuning value can be adjusted with and keys Tune base level and power levels 19 15 and 5 to target level Press Calculate coefficients Change TxPA Mode to Low from the drop down menu When the PA Mode is changed the previous values are saved in memory and the ones for new mode are shown ...

Page 110: ...cients Typical values EGSM900 Power level PA high mode PA low mode 5 0 700 0 750 7 0 530 0 570 15 0 190 0 210 0 190 0 210 19 0 170 0 180 0 170 0 180 Base 0 140 0 150 0 140 0 150 If values shown are within limits select Stop and check Save values to phone permanent memory Select Yes to save values to phone Continue tuning from GSM1800 Choose the correct band from the dropdown menu ...

Page 111: ...A mode can not be changed because tuning is only made in High mode Typical values GSM1800 Power level PA high mode 0 0 620 0 670 11 0 170 0 190 15 0 150 0 170 Base 0 140 0 150 If values shown are within limits select Stop and check Save values to phone permanent memory Select Yes to save values to phone Close the TX Power Level Tuning dialog to end tuning ...

Page 112: ...ssue 1 07 02 Appendix Frequency mappings The following figure shows the RX TX operating frequency mapping to the frequency synthesizer operating frequency For a more detailed list of actual channel number map pings see below Figure 14 NHL 2NA VCO frequency mappings ...

Page 113: ...882 2 927 2 3528 8 3708 8 11 892 2 937 2 3568 8 3748 8 73 904 6 949 6 3618 4 3798 4 986 882 4 927 4 3529 6 3709 6 12 892 4 937 4 3569 6 3749 6 74 904 8 949 8 3619 2 3799 2 987 882 6 927 6 3530 4 3710 4 13 892 6 937 6 3570 4 3750 4 75 905 950 3620 3800 988 882 8 927 8 3531 2 3711 2 14 892 8 937 8 3571 2 3751 2 76 905 2 950 2 3620 8 3800 8 989 883 928 3532 3712 15 893 938 3572 3752 77 905 4 950 4 36...

Page 114: ...3589 6 3769 6 99 909 8 954 8 3639 2 3819 2 1012 887 6 932 6 3550 4 3730 4 38 897 6 942 6 3590 4 3770 4 100 910 955 3640 3820 1013 887 8 932 8 3551 2 3731 2 39 897 8 942 8 3591 2 3771 2 101 910 2 955 2 3640 8 3820 8 1014 888 933 3552 3732 40 898 943 3592 3772 102 910 4 955 4 3641 6 3821 6 1015 888 2 933 2 3552 8 3732 8 41 898 2 943 2 3592 8 3772 8 103 910 6 955 6 3642 4 3822 4 1016 888 4 933 4 3553...

Page 115: ...661 2 765 1760 8 1855 8 3521 6 3711 6 514 1710 6 1805 6 6842 4 7222 4 640 1735 8 1830 8 3471 6 3661 6 766 1761 1856 3522 3712 515 1710 8 1805 8 6843 2 7223 2 641 1736 1831 3472 3662 767 1761 2 1856 2 3522 4 3712 4 516 1711 1806 6844 7224 642 1736 2 1831 2 3472 4 3662 4 768 1761 4 1856 4 3522 8 3712 8 517 1711 2 1806 2 6844 8 7224 8 643 1736 4 1831 4 3472 8 3662 8 769 1761 6 1856 6 3523 2 3713 2 51...

Page 116: ... 2 538 1715 4 1810 4 6861 6 7241 6 664 1740 6 1835 6 3481 2 3671 2 790 1765 8 1860 8 3531 6 3721 6 539 1715 6 1810 6 6862 4 7242 4 665 1740 8 1835 8 3481 6 3671 6 791 1766 1861 3532 3722 540 1715 8 1810 8 6863 2 7243 2 666 1741 1836 3482 3672 792 1766 2 1861 2 3532 4 3722 4 541 1716 1811 6864 7244 667 1741 2 1836 2 3482 4 3672 4 793 1766 4 1861 4 3532 8 3722 8 542 1716 2 1811 2 6864 8 7244 8 668 1...

Page 117: ...32 565 1720 8 1815 8 6883 2 7263 2 691 1746 1841 3492 3682 817 1771 2 1866 2 3542 4 3732 4 566 1721 1816 6884 7264 692 1746 2 1841 2 3492 4 3682 4 818 1771 4 1866 4 3542 8 3732 8 567 1721 2 1816 2 6884 8 7264 8 693 1746 4 1841 4 3492 8 3682 8 819 1771 6 1866 6 3543 2 3733 2 568 1721 4 1816 4 6885 6 7265 6 694 1746 6 1841 6 3493 2 3683 2 820 1771 8 1866 8 3543 6 3733 6 569 1721 6 1816 6 6886 4 7266...

Page 118: ...92 1726 2 1821 2 3452 4 3642 4 718 1751 4 1846 4 3502 8 3692 8 844 1776 6 1871 6 3553 2 3743 2 593 1726 4 1821 4 3452 8 3642 8 719 1751 6 1846 6 3503 2 3693 2 845 1776 8 1871 8 3553 6 3743 6 594 1726 6 1821 6 3453 2 3643 2 720 1751 8 1846 8 3503 6 3693 6 846 1777 1872 3554 3744 595 1726 8 1821 8 3453 6 3643 6 721 1752 1847 3504 3694 847 1777 2 1872 2 3554 4 3744 4 596 1727 1822 3454 3644 722 1752 ...

Page 119: ...3753 6 619 1731 6 1826 6 3463 2 3653 2 745 1756 8 1851 8 3513 6 3703 6 871 1782 1877 3564 3754 620 1731 8 1826 8 3463 6 3653 6 746 1757 1852 3514 3704 872 1782 2 1877 2 3564 4 3754 4 621 1732 1827 3464 3654 747 1757 2 1852 2 3514 4 3704 4 873 1782 4 1877 4 3564 8 3754 8 622 1732 2 1827 2 3464 4 3654 4 748 1757 4 1852 4 3514 8 3704 8 874 1782 6 1877 6 3565 2 3755 2 623 1732 4 1827 4 3464 8 3654 8 7...

Page 120: ...tion Issue 1 07 02 634 1734 6 1829 6 3469 2 3659 2 760 1759 8 1854 8 3519 6 3709 6 635 1734 8 1829 8 3469 6 3659 6 761 1760 1855 3520 3710 636 1735 1830 3470 3660 762 1760 2 1855 2 3520 4 3710 4 637 1735 2 1830 2 3470 4 3660 4 763 1760 4 1855 4 3520 8 3710 8 ...

Page 121: ...lity to adjust Therefore every time you change the UI module you need to adjust the contrast point UI module troubleshooting cases Display blank There is no image on the display Display looks the same when the phone is on as it does when the phone is off Display blank Put the phone on MJF 7 FLA 21 or MJS 9Q OK Reflash and retest OK Check UI connector both male and female Fail Faulty OK Check EMI f...

Page 122: ...Yes Yes Change contrast and insert picture with display test Is image OK Reflash and retest No Check the UI connectors and LCD connector from the top of the module both male and female Are they OK No Repair the connector and retest No Change EMI filter and retest Check EMI filters visually Are they OK Yes Yes Problem solved Change UPP WD2 and retest OK Yes Change UI module and retest OK Yes Proble...

Page 123: ...CCS Technical Documentation NHL 2NA Issue 1 07 02 Nokia Corporation Page 3 This page intentionally left blank ...

Page 124: ... keymat switch or module and retest OK Check connectors both male and female Are they OK No Repair connectors and retest Yes Check in MJS 9Q that key lines are scanned in boot up pins 11 16 and 19 22 Yes Change 5 way switch or module and retest No Check EMI filters visually Are they OK No Change EMI filter and retest Yes Change UPP WD2 and test if OK No Change UI module and test if OK Yes Problem ...

Page 125: ...back light current gauge vibra keyboard and hall sensor have their own flowcharts that describe how problems can be solved Although the hall sensor is located in the LG4 its troubleshooting is described in this section The following flow charts have some links to each other so they are linked to each other and in this way the root cause of a problem can be solved Please note also that there is a s...

Page 126: ...ure from J021 that voltage is Vbat when the keyboard backlight is turned on OK Check and measure that R013 and R014 are on their places and parallel resistance is 21 4 Ω OK yes no Change resistors and retest Check LEDs that they are properly assembled anode cathode OK yes no Reassemble them and retest Does backlight work Change the whole grip PWB and retest no Problem solved yes Change the whole g...

Page 127: ... places OK no Assemble missing or broken components and retest yes Measure that J008 gives 20 Hz PWM signal when J007 is pulled up to Vbat And is Vbat when pulled down OK Check Connectors that their contacts are ok OK Repair connectors and change if necessary Measure from J001 that it has Vbat voltage OK yes no Check Connectors that their contacts OK yes Repair connectors and change if necessary n...

Page 128: ...doesn t rotate or vibrate Vibra is continuously on Measure that V012 V016 and C004 are as specified OK Vibra is noisy Vibra malfunction Is the vibra jammed or are its contact pads dramatically weared or is vibra component damaged no Is it vibra component itself that makes noise yes no no yes Check flex cable and connectors that their contacts are ok yes yes Change Grip module and retest no yes Che...

Page 129: ...hey short circuited yes Run Phoenix keyboard test and check if there was dirt under the keydome or keypads Clear pads change the keymat and retest no yes Check Connectors that their contacts are ok Check Flex cable between grip and transceiver unit OK Check EMI filter Z384 is it physically damaged OK yes yes yes no no no Change the Flex cable and retest OK no no Change EMI filter and retest OK Pro...

Page 130: ...n magnet isn t above N380 Pin3 1 8V when magnet is above it OK yes no Lock keys indicator does not show up while pushing grip to close position Check that N380 version is 1718 or newer 1719 etc yes Change the newer version and retest no Change UPP_wd2 OK Change the N380 to a new one and retest OK no yes Beyond of economical repair Problem solved no yes Problem solved Open grip on service position ...

Page 131: ...experience of a correctly operating ref erence device may be needed in order to detect what actually is wrong or is there any thing wrong at all It is easy for the user to take bad looking images in bad conditions thus the camera operation has to be checked always in constant conditions lighting temperature or by using a second known to be good device as a reference Experience significantly helps ...

Page 132: ...end user when shooting pictures and thus may result in complaints The listed items are normal to camera operation and do not cause a need for e g chang ing the camera module Distance to target the lens in the module is specified to operate satisfactorily from 30cm to infinite distance of scene objects In practice the operation is such that close objects may be noticed to get more blurred when dist...

Page 133: ...se on the edges than in the centre Figure 3 Especially this type of images are affected much by lack of sharpness in edges corners Geometrical distortion camera lens will cause some amount of so called barrel distortion in images In practice this appears as bending of straight objects in edges of the image See Geometrical distortion and Handshake has caused blurring of this image Note geo metrical...

Page 134: ...en at daytime if image is taken very carelessly See Handshake has caused blurring of this image Note geometrical barrel distortion in background for example This is normal behavior do not change the camera module Figure 5 Handshake has caused blurring of this image Note geometrical barrel distortion in background Movement in bright light If pictures of moving objects are taken or if the device is ...

Page 135: ...s celsius Phone display if the display contrast is set too dark the image quality degrades quite much the images may be very dark naturally depending on the setting If display con trast is set too bright image contrast appears bad and faint This flaw is easily cured by setting the display contrast to correct value This is normal behavior do not change the camera module Basic rules of photography e...

Page 136: ...e detected from operator country sign information In some very few countries both 50 and 60 Hz networks are present and thus probability for the phenomena grows This is normal behavior do not change the camera module Figure 9 Flicker in image of white uniform object illuminated by strong fluorescent light Bright light outside of image view Especially sun can cause clearly visible halo effects and ...

Page 137: ...l Documentation NHL 2NA Issue 1 06 02 Nokia Corporation Page 7 Figure 10 A lens reflection effect caused by sun shining above the scene Figure 11 A good picture taken indoors Figure 12 A good picture taken outdoors ...

Page 138: ...ule and the principle of fixing it to a phone The main parts of the module are Threaded lens barrel containing the lens itself and the lens aperture Infrared filter which is used to prevent infrared light from contaminating the image colors IR filter is glued to the lens holder lens holder which is made of conductive metallized plastic and attached to PWB by glue Image sensor which is glued and wi...

Page 139: ...are should be taken that the diffuser white surface of the adapter is clean If adapter is not available uniform white target such as a clean straight white sheet of paper may be used but extreme care should be taken to arrange illumination conditions so that the target is uniformly illuminated Black spots in image are caused by dirt particles trapped into the optical system clearly visible and sha...

Page 140: ...sible to remove the particle s by using clean compressed air Never wipe the lens surface before trying compressed air the possibility of damaging the lens is substantial Always check the image sharpness after removing dust Testing for sharpness If pictures taken with some device are claimed to be blurry there are four possible sources for the claim 1 Back window is fingerprinted soiled dirty visib...

Page 141: ...ttings at least 65000 colors 16 bit have to be used 256 8 bit color setting is not sufficient and true color 24 bit 16 million colors or 32 bit full color setting is recommended If there appears to be a clearly noticeable difference between the reference image and the test images the module might have misfocused lens In this case the module should be changed Always re check the resolution after ch...

Page 142: ...NHL 2NA CCS Technical Documentation Page 12 Nokia Corporation Issue 1 06 02 Figure 15 Image taken with clear back window Figure 16 Image taken with a faint fingerprint on back window ...

Page 143: ...CCS Technical Documentation NHL 2NA Issue 1 06 02 Nokia Corporation Page 13 Figure 17 Image taken with a thick fingerprint on back window Figure 18 Image taken with badly soiled back window ...

Page 144: ...ly missing bits will cause a hardware failure message Bit errors can be typically seen in images taken of any object and they should be most visible in full VGA resolution images Viewfinder images may not contain the errors at all due to lower bit rate used in this mode A good practice is to use uniform white test target The errors will be clearly visible as colorful sharp dots or lines in camera ...

Page 145: ...Hardware failure message displayed OK Chamber and camera properly in place Fixing snap OK Re position replace broken parts OK Camera OP voltages OK Go to power supply trouble shooting No Yes Yes No No No Check remove audio chamber and camera Measure operating voltages over C266 and C284 VAUX2 over C266 2 78V nominal VAUX3 over C284 1 8V nominal Continued on next page ...

Page 146: ...e I2C Clk and Data over R134 and R135 I2C signal amplitude 1 8V nominal Change camera modes to get I2C traffic Both signals operate amplitude OK Replace R134 and R135 OK Go to UPP trouble shooting replace UPP No Check camera operation Yes Yes Measure CCP Clk and Data over R100 and R101 CCP signal amplitude 150mV 300mV nominal common mode voltage 0 9V nominal clock 26MHz Use viewfinder mode and osc...

Page 147: ...another camera Camera module possibly broken phone dropped try another camera Check viewfinder image using a real world target Image badly blurred but changes color according to target Check clean dirt in camera window between window camera If viewfinder image can be seen but there is something wrong with it see Chapter 5 3 Bad image quality No Yes No No Yes Yes Check adjust display contrast Image...

Page 148: ...ge for black dots or spots Analyze those Are the dots sharp or blurry Dirt is on image sensor replace camera Re check the window and lens Check for defective camera window If no help replace camera No Yes Sharp Blurry Replace camera misfocused lens Yes No Viewfinder image is dark No Yes Check the display contrast setting and adjust to be correct OK OK No No Data errors in image Proceed as for Hard...

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